Antifriction bearing



Nov. 8, 1927. 1,648,272

- s. B. HASELTINE Filed Jan. 21. 1924 Patented Nov.. 8, i921?.

sTAoY B. nasser/HNE, or crrroAGdILLrNoIs, AssIGNoR, BY iansNE ASSIGNMENTS, To

' W. rr. MINER, INC., A CORPORATION or DELAWARE.

ANTIrRro'rroN BEARING.

Application led January 21, 1924. Serial No. 687,527.

This invention relates to improvements in anti-friction bearings.

One object of the invention is to provide an anti-friction bearing of simple, eiiicient and economical construction, adapted to be used .in railway cars, .and employing a rolling anti-friction element, which is automatically centered under the influence of gravity Aand the action of spring pressure, both Work-l ing in conjunction.

In the drawing forming a part of vthis specification, Figure 1 is a vertical sectional view taken lengthwise of the car through the l ends of the body and truck bolsters and showing Amy Vimprovements .in connection therewith. And Figure 2 is a vertical sectional view corresponding to the section line 2f-2 ofl Figure 1. In said drawing, 10 denotes the upper yportion of a truck bolster, and 11 the underside of the opposed'body bolster of a rail- 4way car. The improve-d bearing is shown applied to the truck bolster and comprises, broadly,. a retaining member or housing A; an anti-friction element proper B; a supporting block C; and spring plates D-D.

The retaining member A, preferably in the form of a casting, is formed'with end Walls 12 and side walls 13, the latter being f laterally oset to provide guides 14, as shown. Lugs 15 are provided on the'casting for securing the same to the truck bolster by vmeans of rivets orv other suitable securing means. v

The anti-frictionv element B consists of a. main or central roller portion 16 and end wings o r counterweights 17 at each end thereof and integral therewith. The lower edge of each counterweight is substantially flat for a short distance either side of center, the remainder being curved or arcuate and of a somewhat greater radius than that of the central portion 16 of the anti-friction element. Each of the counterweight portions 17 projects into the corresponding guide 14 provided at the sides of the housing. The bounding walls of the guides are shaped to conform to the lines generated by the counterweights during the rolling movement of the anti-friction element with a slight additional working clearance, so that lateral bodily shifting of the counterweights with respect to the retaining member is substantially prevented. Any bodily shifting of thel anti-frictio`n element longitudinally `of itself is practically prevented because the counterweights are of such a thickness. thatl they extend to closely adjacent the opposed walls of the retaining member. Y

The bottom block C is arranged within'the retaining member, the same preferably having a hardened wear plate 18 on its top to engage and support the center portion 16 of the anti-friction element. Intermediate Athe ends of the block C substantially centrally thereof and integral therewith, one' oneach side, are a pair of ridges or fulcrum projections 19, one extending into each of, the V guideways below the counterweight extensions 17. l v

Spring plates or leaf springs *DI are` arranged one on each fulcrum part 19, the upper faces of the freeends of the springs normally engaging horizontally extending abutments or shoulders 20 provided on the housing as shown in Figure 1.. There is suiii cient clearance between said 'abut-ments and the bolster surface 10 so that these spring plates may be flexed downwardly aboutthe .fulcrum when the counterweights 17 yroll thereon. The springs are prevented from endwise shifting on account of the vertical walls extending downwardly from the shoulders or abutments 20 of the retaining member and are prevented against shifting latere ally by the wear plate 18 and the side walls of the retaining member.

In operation, the anti-friction element proper is engaged by the under surface 11 vof the body bolster, rolling said element toward one extreme position as shown in ydotted lines in Figure 1 (assumingthat the direction of the movement of the bolstery 11 is to the left), the counterw-eights 17,-rolling on vtheir spring plates to cause the flexing thereof downwardly at one end about V'the fulcrums 19, the other free ends of the spring plates being rigidly' held against upward movement by engagement with their respective abutment-s or shoulders 20. As soon as the load is released, the downwardly flexed ends of the spring plates D automatically return to their normal position, and acting in conjunction with'the influence of gravity on the tilted counterweights, bring the antifriction element back to its normal central position, thus making the return of the anti` friction element unusually sensitive andh travel.

V- I Ahave Vherein shown andv described what I now consider the preferred manner of carrying` out myA invention, but the same is -merely illustrative 'and I contemplate all changes and modifications that come Within thescope of the claims appendedv hereto.

I claim: i A l. In: an; 'anti-friction bearing, the combination with a retaining member provided lwith a bearing surface; of an'anti-friction Jelement:idaptedzto roll to either side of norvmalceiitral position on said bearing surface,

said element being provided with counter- Weight means for centering the saine, and resilient, means Co-Operating with said counl-tervveight means andnoperated by the movement of the'same, said counteriveiglit means fandsaid resilient means being mounted so Vrastofexert a combined resilientand gravitational effect upon sai'd'anti-friction element Without interference of one With theother.'

2l In an anti-'friction bearing, the combination with' `avretaining member provided vWith a/ bearing-surface; of an anti-friction elementiadapted to roll to either side of nor- `mfalcentral` posit-ion on said ybearing surface, said element being vprovided with eccentri'okportions having engaging surfaces .extending tangentiallyivith reference to the bearing surface of said anti-friction element; Y

and resilient-means vassociated With said retainer andi adapted toubeflexed by engage- Vzmentwith the bearing surfaces of said eccentric portions.

3. Inananti-friction bearing,the combination with a retaining member adapted to be vsecuredr'to a bolster or the like; of an antifricti'on element adlapted'hto roll vto either side of normal central position; leaf springs mounted in said retainer and fulerumed intermediate their ends;`said'ends being limited against movement in one direction; and counterweiglit portions eccentrically mounted with reference to said element and having engaging surfaces extendingtaiigentially vwith reference to the bearing surface'ofsaid element, said" engaging surfaces being adapted to flea; opposite ends of said leaf springs dependent upondireetion of movement of said element. Y Y

t. In amanti-friction bearing, the combination. with a retaining member having guides at its sides, each of said guides being provided with oppositely arranged offset shoulders; ofy a bearingV block Ahaving centra'lly arranged laterally projectingrridges; leaf springs arranged in each side of said retainer and having the opposite endwportions thereof disposed beneath saidwshoul.- ders, and each having any intermediate por.- tion resting upon a ridge; an antiefriction element mounted on said' bearing block and adapted to roll to'ether, side of, central position Wit-h reference thereto, said element-fb9- ing provided with laterally extending counteruf'eiglit sections arranged inf said-guides, and having bearing surfaceszarrangedwtangentially With reference Vto the bearing surface of said element, the bearing surfaces-of i said eounterweight sections being adapted to engage said leafsprings so-as tozindepende'ntly flex opposite end portions thereof dependent upon' thedirection ofmovement of said element. 5. In an anti-friction.bearingthe,combi nation with a retaininginember provided with a bearing surface; ofan` anti-friction element adapted to roll to; either side of normal central position on -said bearing surface, said. element being providedi'with'eccentrically disposed eountervveight sections at opposite ends thereof, said retainer being provided with guide ineansforsaid4 Counter- Weight sections; resilient means secured4 in said retainer, said counter-Weight sections having actuating portions therein-` engaging said resilient means to-iex the saine by .movement of said anti-friction element toeither side ofv central position to thereby exert a returningforce upon said` element.

In Witness that I claim the foregoing I have hereunto subscribed my .namethis 16th day of January, 1924. i

sTAoY B. HAsnLTiN-E. 

